After a break of an Allen-screw (appr. 600 operating hours) in a powered sailplane S10 with CIBA-GEIGY drive shaft has been improved
Serial Numbers: S10: 10-03 through 10-07, 10-10, 10-12, 10-14 through 10-19, 10-21, 10-22, 10-25 through 10-27, 10-55 S10-V: 14-015 and all converted versions of the affected serial numbers S10
